Rows: 57,775
Columns: 20
$ Date <chr> "01/01/2022", "01/02/2022", "01/03/2022…
$ Source <chr> "AQS", "AQS", "AQS", "AQS", "AQS", "AQS…
$ Site.ID <int> 60010007, 60010007, 60010007, 60010007,…
$ POC <int> 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, …
$ Daily.Mean.PM2.5.Concentration <dbl> 12.7, 13.9, 7.1, 3.7, 4.2, 3.8, 2.3, 6.…
$ UNITS <chr> "ug/m3 LC", "ug/m3 LC", "ug/m3 LC", "ug…
$ DAILY_AQI_VALUE <int> 52, 55, 30, 15, 18, 16, 10, 29, 54, 47,…
$ Site.Name <chr> "Livermore", "Livermore", "Livermore", …
$ DAILY_OBS_COUNT <int> 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, …
$ PERCENT_COMPLETE <dbl> 100, 100, 100, 100, 100, 100, 100, 100,…
$ AQS_PARAMETER_CODE <int> 88101, 88101, 88101, 88101, 88101, 8810…
$ AQS_PARAMETER_DESC <chr> "PM2.5 - Local Conditions", "PM2.5 - Lo…
$ CBSA_CODE <int> 41860, 41860, 41860, 41860, 41860, 4186…
$ CBSA_NAME <chr> "San Francisco-Oakland-Hayward, CA", "S…
$ STATE_CODE <int> 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, …
$ STATE <chr> "California", "California", "California…
$ COUNTY_CODE <int> 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, …
$ COUNTY <chr> "Alameda", "Alameda", "Alameda", "Alame…
$ SITE_LATITUDE <dbl> 37.68753, 37.68753, 37.68753, 37.68753,…
$ SITE_LONGITUDE <dbl> -121.7842, -121.7842, -121.7842, -121.7…